Correction to This Article
The article referred incorrectly to the presence of U.S. citizens on a CIA list of people the agency seeks to kill or capture. After The Post's report was published, a source said that a statement the source made about the CIA list was misunderstood. Additional reporting produced no independent confirmation of the original report, and a CIA spokesman said that The Post's account of the list was incorrect. The military's Joint Special Operations Command maintains a target list that includes several Americans. In recent weeks, U.S. officials have said that the government is prepared to kill U.S. citizens who are believed to be involved in terrorist activities that threaten Americans.

U.S. military teams, intelligence deeply involved in aiding Yemen on strikes

In a newly built joint operations center, the American advisers are acting as intermediaries between the Yemeni forces and hundreds of U.S. military and intelligence officers working in Washington, Virginia and Tampa and at Fort Meade, Md., to collect, analyze and route intelligence.

The combined efforts have resulted in more than two dozen ground raids and airstrikes. Military and intelligence officials suspect there are several hundred members of AQAP, a group that has historical links to the main al-Qaeda organization but that is thought to operate independently.

The chairman of the Joint Chiefs of Staff, Adm. Mike Mullen, told a Navy War College class in early January that the United States had "no plans" to send ground troops to Yemen and that he had been concerned about the growing al-Qaeda presence there "for a long time now."

"We have worked hard to try to improve our relationships and training, education and war-fighting support," Mullen said. "And, yet, we still have a long way to go."

Saleh has faced pressure not only from the United States but also his country's main financial backers, Saudi Arabia and the United Arab Emirates, to gain better control over its lawless northern border. In August, Saleh asked U.S. officials to begin a more in-depth conversation over how the two countries might work together, according to administration officials. The current operation evolved from those talks.

"President Saleh was serious about going after al-Qaeda and wasn't going to resist our encouragement," the senior official said.

The Obama administration's deepening of bilateral intelligence relations builds on ties forged during George J. Tenet's tenure as CIA director.

Shortly after the Sept. 11, 2001, attacks, Tenet coaxed Saleh into a partnership that would give the CIA and U.S. military units the means to attack terrorist training camps and al-Qaeda targets. Saleh agreed, in part, because he believed that his country, the ancestral home of Osama bin Laden, was next on the U.S. invasion list, according to an adviser to the Yemeni president.

Tenet provided Saleh's forces with helicopters, eavesdropping equipment and 100 Army Special Forces members to train an antiterrorism unit. He also won Saleh's approval to fly Predator drones armed with Hellfire missiles over the country. In November 2002, a CIA missile strike killed six al-Qaeda operatives driving through the desert. The target was Abu Ali al-Harithi, organizer of the 2000 attack on the USS Cole. Killed with him was a U.S. citizen, Kamal Derwish, who the CIA knew was in the car.

Word that the CIA had purposefully killed Derwish drew attention to the unconventional nature of the new conflict and to the secret legal deliberations over whether killing a U.S. citizen was legal and ethical.

After the Sept. 11 attacks, Bush gave the CIA, and later the military, authority to kill U.S. citizens abroad if strong evidence existed that an American was involved in organizing or carrying out terrorist actions against the United States or U.S. interests, military and intelligence officials said. The evidence has to meet a certain, defined threshold. The person, for instance, has to pose "a continuing and imminent threat to U.S. persons and interests," said one former intelligence official.

The Obama administration has adopted the same stance. If a U.S. citizen joins al-Qaeda, "it doesn't really change anything from the standpoint of whether we can target them," a senior administration official said. "They are then part of the enemy."

Both the CIA and the JSOC maintain lists of individuals, called "High Value Targets" and "High Value Individuals," whom they seek to kill or capture. The JSOC list includes three Americans, including Aulaqi, whose name was added late last year. As of several months ago, the CIA list included three U.S. citizens, and an intelligence official said that Aulaqi's name has now been added.

Intelligence officials say the New Mexico-born imam also has been linked to the Army psychiatrist who is accused of killing 12 soldiers and a civilian at Fort Hood, Tex., although his communications with Maj. Nidal M. Hasan were largely academic in nature. Authorities say that Aulaqi is the most important native, English-speaking al-Qaeda figure and that he was in contact with the Nigerian accused of attempting to bomb a U.S. airliner on Christmas Day.

Yemeni Foreign Minister Abubaker al-Qirbi said in Washington last week that his government's present goal is to persuade Aulaqi to surrender so he can face local criminal charges stemming from his contacts with the Fort Hood suspect. Aulaqi is being tracked by the country's security forces, the minister added, and is now thought to be in the southern province of Shabwa.